839121 has 4 divisors (see below), whose sum is σ = 1118832. Its totient is φ = 559412.

The previous prime is 839117. The next prime is 839131. The reversal of 839121 is 121938.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 839121 - 2² = 839117 is a prime.

It is an Ulam number.

It is a D-number.

839121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 839091 and 839100.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 839121.

It is not an unprimeable number, because it can be changed into a prime (839131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139851 + ... + 139856.

It is an arithmetic number, because the mean of its divisors is an integer number (279708).

2⁸³⁹¹²¹ is an apocalyptic number.

It is an amenable number.

839121 is a deficient number, since it is larger than the sum of its proper divisors (279711).

839121 is a wasteful number, since it uses less digits than its factorization.

839121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279710.

The product of its digits is 432, while the sum is 24.

The square root of 839121 is about 916.0354796622. The cubic root of 839121 is about 94.3209565880.

The spelling of 839121 in words is "eight hundred thirty-nine thousand, one hundred twenty-one".